I don't think the problem description is clear that both the Mir and Unity8 compositors are affected. (It can be read as applying to the stack including Unity8.) Thanks for clarifying.
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to libdrm in Ubuntu. https://bugs.launchpad.net/bugs/1553328 Title: Mir/Unity8/USC crashes/freezes on nouveau (nv50) in pushbuf_kref() especially with multiple monitors, webbrowser-app or system settings Status in Canonical System Image: Triaged Status in Mir: Triaged Status in Nouveau Xorg driver: Unknown Status in Unity System Compositor: Triaged Status in libdrm package in Ubuntu: Triaged Status in mesa package in Ubuntu: Invalid Status in mir package in Ubuntu: Triaged Status in qtmir package in Ubuntu: In Progress Status in qtubuntu package in Ubuntu: In Progress Bug description: Unit8 froze up while I was trying to open system settings. ProblemType: Crash DistroRelease: Ubuntu 16.04 Package: unity8 8.11+16.04.20160216.1-0ubuntu1 ProcVersionSignature: Ubuntu 4.4.0-9.24-generic 4.4.3 Uname: Linux 4.4.0-9-generic x86_64 ApportVersion: 2.20-0ubuntu3 Architecture: amd64 Date: Fri Mar 4 19:12:54 2016 ExecutablePath: /usr/bin/unity8 InstallationDate: Installed on 2015-05-10 (299 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) ProcCmdline: unity8 SegvAnalysis: Segfault happened at: 0x7f58d568706c: mov 0x8(%rsi),%edx PC (0x7f58d568706c) ok source "0x8(%rsi)" (0x00000008) not located in a known VMA region (needed readable region)! destination "%edx" ok Stack memory exhausted (SP below stack segment) SegvReason: reading NULL VMA Signal: 11 SourcePackage: unity8 StacktraceTop: ?? () from /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2 ?? () from /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2 ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so ?? () from /usr/lib/x86_64-linux-gnu/mesa-egl/libEGL.so.1 Title: unity8 crashed with SIGSEGV UpgradeStatus: Upgraded to xenial on 2015-11-07 (118 days ago) UserGroups: adm autopilot cdrom dip lpadmin plugdev sambashare sudo To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1553328/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp